"Levy" is the internal descriptor for a unit that will desert on its own, disappearing from the game. This does not appear on their character sheet. The Gladiators, for instance, "desert" after either dealing 1 point of damage or taking 1 point of damage in a battle.

There is another type of levy, who has a set percent chance to desert at the end of each turn, but this type consists entirely of powerful Horrors. The chance for these things to get bored of existing is typically 5%.